The daily temperature variation of the golden Gate bridge Ilcan be in access of 20C. The bridge os approximately 2 km long and Is made of steel.

What is approximate change of length with temprature variation?

Dear Student

Thermal expansion coefficients for steel = 12 x 10^-6per kelvin
Since , change of temperature is same in celcius and kelvin
change in length = Length xThermal expansion coefficient x change in temperature
So, Linear change =12 x 10^-6x 20 x 2000


Thanks